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SUMMARY OF QUARTERLY FINANCIAL INFORMATION Quarterly Financial Information Disclosure (Details) (USD $) In Thousands, except Share data, unless otherwise specified | 0 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Nov. 29, 2011 | Dec. 31, 2011 | Sep. 30, 2011 | Jun. 30, 2011 | Mar. 31, 2011 | Dec. 31, 2010 | Sep. 30, 2010 | Jun. 30, 2010 | Mar. 31, 2010 | Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009
Quarterly Financial Information Disclosure [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Revenue |  | $ 38,213 | $ 36,656 | $ 37,845 | $ 37,447 | $ 36,044 | $ 36,302 | $ 33,997 | $ 34,702 | $ 150,161 | $ 141,045 | $ 134,445
Income from continuing operations attributable to Common Shareholders |  | 3,789 | 3,843 | 4,245 | 8,185 | 6,589 | 4,592 | 12,250 | 4,829 | 20,062 | 28,260 | 26,574
Income from discontinued operations attributable to Common Shareholders |  | 4,098 | 168 | 25,989 | 1,238 | 423 | 525 | 548 | 301 | 31,493 | 1,797 | 4,559
Net income attributable to Common Shareholders |  | $ 7,887 | $ 4,011 | $ 30,234 | $ 9,423 | $ 7,012 | $ 5,117 | $ 12,798 | $ 5,130 | $ 51,555 | $ 30,057 | $ 31,133
Net income attributable to Common Shareholders per Common Share - basic: |  |  |  |  |  |  |  |  |  |  |  |
Income from continuing operations |  | $ 0.09 | $ 0.10 | $ 0.11 | $ 0.20 | $ 0.16 | $ 0.12 | $ 0.30 | $ 0.12 | $ 0.50 | $ 0.70 | $ 0.70
Income from discontinued operations |  | $ 0.10 | $ 0.00 | $ 0.64 | $ 0.03 | $ 0.01 | $ 0.01 | $ 0.02 | $ 0.01 | $ 0.77 | $ 0.05 | $ 0.12
Net income per share |  | $ 0.19 | $ 0.10 | $ 0.75 | $ 0.23 | $ 0.17 | $ 0.13 | $ 0.32 | $ 0.13 | $ 1.27 | $ 0.75 | $ 0.82
Net income attributable to Common Shareholders per Common Share - diluted: |  |  |  |  |  |  |  |  |  |  |  |
Income from continuing operations |  | $ 0.09 | $ 0.10 | $ 0.10 | $ 0.20 | $ 0.16 | $ 0.12 | $ 0.30 | $ 0.12 | $ 0.49 | $ 0.70 | $ 0.70
Income from discontinued operations |  | $ 0.10 | $ 0.00 | $ 0.64 | $ 0.03 | $ 0.01 | $ 0.01 | $ 0.01 | $ 0.01 | $ 0.77 | $ 0.04 | $ 0.12
Net income per share |  | $ 0.19 | $ 0.10 | $ 0.74 | $ 0.23 | $ 0.17 | $ 0.13 | $ 0.31 | $ 0.13 | $ 1.26 | $ 0.74 | $ 0.82
Cash dividends declared per Common Share | $ 0.18 | $ 0.18 | $ 0.18 | $ 0.18 | $ 0.18 | $ 0.18 | $ 0.18 | $ 0.18 | $ 0.18 | $ 0.72 | $ 0.72 | $ 0.75
Weighted average Common Shares outstanding: |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | 41,785,261 | 40,339,958 | 40,333,575 | 40,317,603 | 40,257,378 | 40,169,141 | 40,134,706 | 39,980,646 |  |  |
Diluted |  | 42,066,390 | 40,628,781 | 40,633,317 | 40,580,173 | 40,594,009 | 40,430,998 | 40,371,812 | 40,149,931 | 40,986,000 | 40,406,000 | 38,242,000

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